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PostPosted: Mon Apr 20, 2026 9:33 am 
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Supercharged
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Joined: Sat Nov 27, 2004 8:03 pm
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Location: IRWIN PA
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Did you cut a cross section of that putty to see what the actual clearance is? I use play dough as silly putty can flow a little. You could cut across it with a fresh single edge razor blade and leave 1/2 on the piston and measure with a caliper (or with your eye if it's clearly thick enough).

Sounds great on the valve timing.

So you were using the 210 gasket with 13.5:1 static CR? Wow. No o-rings? I would worry it wouldn't work a second time, and like Rick's idea... I guess you are using head studs and plenty of torque?

Lou
Hi Lou,
I used a slightly different method of measuring the valve pocket distance from the top of the piston with the clay.
First, I measured the "floor of the pocket in a perpendicular plane to the piston top, then I remeasured in the same plane to the putty's edge smashed by the valve and subtracted the difference between the 2 measuremants. It is just within spec for such things.

Yes, using the AP-210 Big Bore Gasket with 13.5:1 with no O-rings. I use ARP Head Studs on all of my builds. No reason not to! Likely was torqued to 100#/Ft. in 3 even steps.( would hafta check my Notes for sure.
I don't mess with stock fasteners for my go-fast stuff. :D

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PostPosted: Mon Apr 20, 2026 9:57 am 
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Sounds good on the measurement - got it. Nice to hear the AP210 gasket + studs at high torque can handle that pressure.

Lou

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PostPosted: Mon Apr 20, 2026 10:34 am 
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Supercharged
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Location: IRWIN PA
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Sounds good on the measurement - got it. Nice to hear the AP210 gasket + studs at high torque can handle that pressure.

Lou
Them thar Aussies know how to make a SKOOKUM AS FRIG head gasket at a reasonable price point! I wish they had the 3.46" Bore again.

No guarantees that it would work well on Booooooooost or on the Juice, but it was fine for me.

Greg

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PostPosted: Mon Apr 20, 2026 11:38 am 
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Yes Ryan's car was running one at over 13 to one too.

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